Method of making packing rings



C. H. BUTLER ET AL METHOD OF',v MAKING PACKING RINGS Filed Allg. 19. 1922 W. Z M, /040 m Harry H. 70W/@5. @L77 Patented` Oct. 30,` 1923.

1,472,744v UNITEDSTATES PATENT OFFICE.

CHARLES H. BUTLER AND HARRY I-I. J" ONES, OF PHILALELPHIA, PENNSYLVANIA,

ASSIGNORS TO E. F. I-IOUGHTON &. COMPANY, OF PHILADELPHIA, PENNSYLVANIA,

A CORPORATION OF PENNSYLVANIA.

METHOD or MAKING PACKNG RINGS.

Appneatipa filed August 1e, i922. seria1'No.5e2,947.

To all whom t may concern.' i

Be it known that we, CHARLES H. BUTLER and HARRY H. JONES, citizens of the United States, residing in Philadelphia, Pennsylvania, have invented Methods of Making Packing Rings, of which the following is a specification. y

The object of our invention is to improve the process of manufacturing packing rings of the type having a body portion with inner and outer flanges.

By our improved process the ring can be accurately and quickly made and will hold its shape after being cut and pressed.

In the accompanying drawings:

Fig. 1 is a perspective view;

Figs. 2 and 3 are sectional views illustrating the first step in the process;

Figs. 4, 5 and 6 illustrate the second step in the process; and

Figs. 7 and 8 are sectional views illustrating modifications of the press for carrying out our improved process.

Referring in the first instance to Fig. 1, A Ais a packing ring having a body portion a, an inner flange l) and an outer flange c. The upper edges of these flanges are beveled as shown.

In carrying out our improvedprocess, we treat the blank A', Fig. 2, of leather with an oil composition so as to soften it. This is placed on a lower die 1 having an annular groove 2 therein. Directly above the lower die is an upper die 3 having an annular flange 4 rounded at its lower edge. This flange is much narrower than the groove 2 and is in proper alignment therewith so that when pressure is applied the softened sheet of leather A is forced into the groove 2, as shown in Fig. 3, forming an annular body a and inner and outer portions b and c and a section (Z. The blank is of sufficient size so that there is a free edge c projecting from the annular section c. The partially formed blank is then removedy from the die 1 and is placed in a die 5, Fig. 4, b-y means of a tool 6 having an annular flange 7, which is used to force the blank partially into the die, as shown in Fig. 4. l

The die 5 is made in two parts 8 and 9. The part 8 is in the form of a ring and the part 9 is adapted to the opening in the ring and is cut away at 10 to form a' groove. The

bottom of the groove, in the is slightly dished, as at 11, but this may be made flat, if desired.

yWhen the blank is in the position illustrated in Fig. 4, then the `tool 6 is removed and an upper die 12 is moved into position. This die has a heavy flange 13 with a reduced annular extension 14. The ends of the heavy flange on each side of the reduced portion 14 are beveled as at 15 and 16. The edges 17 and 18 form with the edges `19 and 20, respectively, cutters which sever the ring from the section a? and the waste portion e beyond the ring, as shown in Fig. 6. The section el can be utilized in making smaller rings or washers, if desired.

After a ring has been cut and beveled, as in Fig. `6, by pressure, the upper die 12 is withdrawn and either part of the lower die can be moved in respect to the other part so as to discharge the formed ring, the ring being clearly sho-wn in Fig. 1.

In Figs. 7 and 8, we have illustrated a modification of the invention in which the operation is accomplished by a single pair of dies'. upper die.` In this die is an annular ring 14a backed by a spring 21. In the upper die is a disk 22 moved forward by a spring'23.

`This disk clamps the sheet of leather onto, `the surface of the die 1a. vThe edges of the upper die may be similar to those of the die 12, Fig. 5, and acting to cut the washer from the sheet, as illustrated in Fig. 8. i

In the groove 10a of the lower die is a ring 24 backed by a spring 25 so that it'will yieldv as the washer is moved into the groove. The ring will come to a stop when the packing ring has been cut so that the ring will be formed, as illustrated in Fig. 1.

We claim:

The process herein described r of making packing rings, said process consisting in first making an annular depression in a piece of V:material from which the packing ring is to be made, then severing a ring section from the center portion and from the outside eX- cess of material, and finally pressing the lring to shape in which a body portion is formed with inner and outer flanges, the

Hanges being beveled at their free edges.

CHARLES H. BUTLER. HARRY H. JONES.

present instance,

1a is the lower die and 12a is the 

